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first cut at altivec support on darwin patch by (Brian Foley <bfoley at compsoc dot nuigalway dot ie>)

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Originally committed as revision 875 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Brian Foley 2002-08-28 13:14:36 +00:00 committed by Michael Niedermayer
parent 68bd11f5de
commit 59925ef204
5 changed files with 169 additions and 1 deletions
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2
configure vendored
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@ -479,7 +479,7 @@ echo "#define restrict $_restrict" >> $TMPH
# build tree in object directory if source path is different from current one
if test "$source_path_used" = "yes" ; then
DIRS="libav libavcodec libavcodec/alpha libavcodec/armv4l libavcodec/i386 \
libavcodec/liba52 libavcodec/mlib tests"
libavcodec/ppc libavcodec/liba52 libavcodec/mlib tests"
FILES="Makefile libav/Makefile libavcodec/Makefile tests/Makefile"
for dir in $DIRS ; do
mkdir -p $dir

6
libavcodec/Makefile
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@ -67,6 +67,11 @@ ASM_OBJS += alpha/dsputil_alpha_asm.o
CFLAGS += -Wa,-mpca56 -finline-limit=8000 -fforce-addr -freduce-all-givs
endif
ifeq ($(TARGET_ARCH_POWERPC),yes)
CFLAGS += -faltivec
OBJS += ppc/dsputil_altivec.o
endif
SRCS := $(OBJS:.o=.c) $(ASM_OBJS:.o=.S)
OBJS := $(OBJS) $(ASM_OBJS)
@ -106,6 +111,7 @@ clean:
armv4l/*.o armv4l/*~ \
mlib/*.o mlib/*~ \
alpha/*.o alpha/*~ \
ppc/*.o ppc/*~ \
liba52/*.o liba52/*~ \
apiexample $(TESTS)

3
libavcodec/dsputil.c
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@ -1341,6 +1341,9 @@ void dsputil_init(void)
dsputil_init_alpha();
use_permuted_idct = 0;
#endif
#ifdef ARCH_POWERPC
dsputil_init_altivec();
#endif
#ifdef SIMPLE_IDCT
if (ff_idct == NULL) {

7
libavcodec/dsputil.h
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@ -163,6 +163,13 @@ void dsputil_init_mlib(void);
void dsputil_init_alpha(void);
#elif defined(ARCH_POWERPC)
#define emms_c()
#define __align8 __attribute__ ((aligned (16)))
void dsputil_init_altivec(void);
#else
#define emms_c()

152
libavcodec/ppc/dsputil_altivec.c Normal file
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@ -0,0 +1,152 @@
#include "../dsputil.h"
#if CONFIG_DARWIN
#include <sys/sysctl.h>
#endif
int pix_abs16x16_altivec(uint8_t *pix1, uint8_t *pix2, int line_size);
int pix_abs8x8_altivec(uint8_t *pix1, uint8_t *pix2, int line_size);
int pix_sum_altivec(UINT8 * pix, int line_size);
int has_altivec(void);
int pix_abs16x16_altivec(uint8_t *pix1, uint8_t *pix2, int line_size)
{
int i, s;
vector unsigned char perm1, perm2, *pix1v, *pix2v;
vector unsigned char t1, t2, t3,t4, t5;
vector unsigned int sad, zero;
vector signed int sumdiffs;
zero = (vector unsigned int) (0);
sad = (vector unsigned int) (0);
for(i=0;i<16;i++) {
/* Read potentially unaligned pixels into t1 and t2 */
perm1 = vec_lvsl(0, pix1);
pix1v = (vector unsigned char *) pix1;
perm2 = vec_lvsl(0, pix2);
pix2v = (vector unsigned char *) pix2;
t1 = vec_perm(pix1v[0], pix1v[1], perm1);
t2 = vec_perm(pix2v[0], pix2v[1], perm2);
/* Calculate a sum of abs differences vector */
t3 = vec_max(t1, t2);
t4 = vec_min(t1, t2);
t5 = vec_sub(t3, t4);
/* Add each 4 pixel group together and put 4 results into sad */
sad = vec_sum4s(t5, sad);
pix1 += line_size;
pix2 += line_size;
}
/* Sum up the four partial sums, and put the result into s */
sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
sumdiffs = vec_splat(sumdiffs, 3);
vec_ste(sumdiffs, 0, &s);
return s;
}
int pix_abs8x8_altivec(uint8_t *pix1, uint8_t *pix2, int line_size)
{
int i, s;
vector unsigned char perm1, perm2, permclear, *pix1v, *pix2v;
vector unsigned char t1, t2, t3,t4, t5;
vector unsigned int sad, zero;
vector signed int sumdiffs;
zero = (vector unsigned int) (0);
sad = (vector unsigned int) (0);
permclear = (vector unsigned char) (255,255,255,255,255,255,255,255,0,0,0,0,0,0,0,0);
for(i=0;i<8;i++) {
/* Read potentially unaligned pixels into t1 and t2
Since we're reading 16 pixels, and actually only want 8,
mask out the last 8 pixels. The 0s don't change the sum. */
perm1 = vec_lvsl(0, pix1);
pix1v = (vector unsigned char *) pix1;
perm2 = vec_lvsl(0, pix2);
pix2v = (vector unsigned char *) pix2;
t1 = vec_and(vec_perm(pix1v[0], pix1v[1], perm1), permclear);
t2 = vec_and(vec_perm(pix2v[0], pix2v[1], perm2), permclear);
/* Calculate a sum of abs differences vector */
t3 = vec_max(t1, t2);
t4 = vec_min(t1, t2);
t5 = vec_sub(t3, t4);
/* Add each 4 pixel group together and put 4 results into sad */
sad = vec_sum4s(t5, sad);
pix1 += line_size;
pix2 += line_size;
}
/* Sum up the four partial sums, and put the result into s */
sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
sumdiffs = vec_splat(sumdiffs, 3);
vec_ste(sumdiffs, 0, &s);
return s;
}
int pix_sum_altivec(UINT8 * pix, int line_size)
{
vector unsigned char perm, *pixv;
vector unsigned char t1;
vector unsigned int sad, zero;
vector signed int sumdiffs;
int s, i;
zero = (vector unsigned int) (0);
sad = (vector unsigned int) (0);
for (i = 0; i < 16; i++) {
/* Read the potentially unaligned 16 pixels into t1 */
perm = vec_lvsl(0, pix);
pixv = (vector unsigned char *) pix;
t1 = vec_perm(pixv[0], pixv[1], perm);
/* Add each 4 pixel group together and put 4 results into sad */
sad = vec_sum4s(t1, sad);
pix += line_size;
}
/* Sum up the four partial sums, and put the result into s */
sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
sumdiffs = vec_splat(sumdiffs, 3);
vec_ste(sumdiffs, 0, &s);
return s;
}
void dsputil_init_altivec(void)
{
if (has_altivec()) {
pix_abs16x16 = pix_abs16x16_altivec;
pix_abs8x8 = pix_abs8x8_altivec;
pix_sum = pix_sum_altivec;
}
}
int has_altivec(void)
{
#if CONFIG_DARWIN
int sels[2] = {CTL_HW, HW_VECTORUNIT};
int has_vu = 0;
size_t len = sizeof(has_vu);
int err;
err = sysctl(sels, 2, &has_vu, &len, NULL, 0);
if (err == 0) return (has_vu != 0);
#endif
return 0;
}